Benchmark: className.includes vs. classList.contains vs matches

HTML Preparation code:

<div id="foo" class="test"></div>

Tests:

className
var element = document.getElementById("foo"); var i = 1000; while (i--) { if (element.className.includes("test")) {} }
classList
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.classList.contains("test"); }
matches
var element = document.getElementById("foo"); var i = 1000; while (i--) { element.matches(".test"); }

Rendered benchmark preparation results:

Previous results

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0

Browser/OS: Firefox 140 on Windows

classList

1.7M/s

className

1.7M/s

matches

23K/s

View exact numbers

className.includes vs. classList.contains vs matches (version: 1)